<template>
<div>
   <li @mouseenter="isEnter=true" @mouseleave="isEnter = false" :class="{active:isEnter}">
          <label>
            <input type="checkbox" :checked="done" @change="updataTodoById(id)"/>
            <span>{{todo}}</span>
          </label>
          <button class="btn btn-danger" @click="deleteTodoByIndex(index)">删除</button>
    </li>
</div>
</template>

<script>
export default {
    name:"Item",
    props:["id","todo","done","updataTodoById","deleteTodoByIndex"],
    data() {
        return {
            isEnter:false,
        }
    },
}
</script>

<style scoped>
    /*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}
li.active{
    background-color: yellow;
}
li.active button{
    display: block;
}
</style>